[webkit-dev] Transparency on GTK/DirectFB

[Iulian]

Hi guys!

I'm trying to do something similar.
I have webkit (r30726 - because of this -
https://bugs.webkit.org/show_bug.cgi?id=19941)
with GTK over DirectFB.

I created the main page and browser page (as in GtkLauncher).
I successfully setted the ARGB color map for main window (made tests with
WebKit window too).
I called webkit_web_view_set_transparent() to set transparency to true.
I load a page with no background, just some divs on top of the page.

The problem is that i always have the white background (no matter what
background color i set to the FrameView).

If I create only the main window (without webkit) and i use expose-event to
draw a transparent background it works fine, so transparency support has no
problem.

Please help me!
Someone explain me how drawing are done in webkit, so i can have a clue
where to dig.

Iulian


Weber, Bernd wrote:
> 
> Thanks Christian, great pointers!
> 
> I got it working! Very cool!
> 
> -Bernd
> 
> 
> For reference, here the changes I did in GtkLauncher:
> 
> static void
> make_transparent(WebKitWebView* l_web_view)
> {
>     GValue val = {0,};
>     g_value_init (&val, G_TYPE_BOOLEAN);
>     g_value_set_boolean (&val, 1);
>     g_object_set_property (G_OBJECT (l_web_view), "transparent", &val);
> }
> 
> static void
> make_transparent_cb (GtkWidget* widget, gpointer data)
> {
>     make_transparent (web_view);
> }
> 
> static void
> set_colormap(GtkWidget* window)
> {
>     GdkScreen* screen = gtk_widget_get_screen (window);
>     GdkColormap* colormap = gdk_screen_get_rgba_colormap (screen);
>     if (!colormap) {
>     	g_warning ("No ARGB colormap available! Using RGB colormap!\n");
> 	colormap = gdk_screen_get_rgb_colormap (screen);
>     } else {
>     	g_print ("Using ARGB colormap now! :-)\n");
>     }
>     gtk_widget_set_colormap (window, colormap);
> }
> 
> In main.c:
>  main_window = create_window ();
>  set_colormap(main_window);
> 
> 
> 
> -----Original Message-----
> From: webkit-dev-bounces at lists.webkit.org
> [mailto:webkit-dev-bounces at lists.webkit.org] On Behalf Of Christian
> Dywan
> Sent: Wednesday, September 24, 2008 3:48 PM
> To: webkit-dev at lists.webkit.org
> Subject: Re: [webkit-dev] Transparency on GTK/DirectFB
> 
> Am Wed, 24 Sep 2008 15:16:24 -0700
> schrieb Darin Adler <darin at apple.com>:
> 
>> On Sep 24, 2008, at 3:10 PM, Weber, Bernd wrote:
>> 
>> > The holy grail however would be to achieve transparency to the  
>> > underlying desktop, by defining "transparent" as the background
>> > color.
>> 
>> WebKit definitely supports this. It's used this way in the Mac OS X  
>> Dashboard.
>> 
>> > I'm not sure whether Webkit, especially with GTK/DirectFB,
>> > supports this right now.
>> 
>> I don't know if the GTK/DirectFB port supports it. That's a question  
>> for someone else.
> 
> Take a look at the headers. There's no other documentation at this
> point but it should be intuitive enough for most of what we have.
> 
> webkit_web_view_set_transparent
> 
> You will want that. And make sure you have an ARGB colour map on your
> window, ie. when you create your toplevel window.
> 
> ciao,
>     Christian
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> webkit-dev at lists.webkit.org
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